I have an OBP-1 Preamp with pots removed from a Roscoe bass for sale or trade. For trade I would like a set of Roscoe Bartolini's P4 Pick ups from a 5/6 String Roscoe or $80 shipped to the lower 48. PayPal is accepted. Pay by 2pm est. and the preamp will go out the same day via USPS. This preamp is Vol, Blend, Bass, Treble.